Pool and Spa
Questions about Pool Repair? Ask an Expert Online.
You sound like you are doing all the correct things but you may just have a clogged or bad pump that is feeding the water through the heater. I know it says DR this is dry but it can get that error for even just a slower volume of water so you may need to remove the pump that feeds the heater and remove the front volute and check the impeller for clogs. If the pump turns on but water will not flow through it you may need to replace the pump and or inspect impeller and motor for damage. The PR error is normal at start up but not the DR. Also try running a garden house down the filter area to try and force water through the system to push any air.